Hitachi DK23EA Specifications - Page 98
Device pausing an Ultra DMA Write
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DMARQ (device) DMACK- (host) STOP (host) Figure 6-15 Device pausing an Ultra DMA Write tRP DDMARDY(device) tRFS HSTROBE (host) DD(15:0) (host) Note: The device negates DMARQ to request termination of the Ultra DMA burst no sooner than tRP after DDMARDY- is negated. SYMBOL tRFS tRP Mode 0(ns) Mode 1(ns) Mode 2(ns) MIN MAX MIN MAX MIN MAX 75 70 60 160 125 100 Mode 3(ns) MIN MAX 60 100 Mode 4(ns) MIN MAX 60 100 Mde5(ns) Description MIN MAX 50 Ready-to-final STROBE time 85 Ready-to-pause time K6602637 Rev.3 02.27.01 - 98 -
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K6602637
Rev.3
02.27.01
- 98 -
Figure 6-15 Device pausing an Ultra DMA Write
DMARQ
(device)
DMACK-
(host)
STOP
(host)
DDMARDY-
(device)
HSTROBE
(host)
DD(15:0)
(host)
t
RFS
t
RP
Note: The device negates DMARQ to request termination of the Ultra DMA burst no sooner than t
RP
after
DDMARDY- is negated.
Mode 0(ns)
Mode 1(ns)
Mode 2(ns)
Mode 3(ns)
Mode 4(ns)
Mde5(ns)
Description
SYMBOL
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX MIN MAX
t
RFS
75
70
60
60
60
50
Ready-to-final
STROBE time
t
RP
160
125
100
100
100
85
Ready-to-pause time